Stoker



Oct. 21 1924. 1,512,392

A. G. B ARHITE S-TOKER Filed Abru v. 1924 llllllllllllll M M u ALLEN e,BAREITTB, oie onions-o, ILLINOIS.

STOKER.

Application filed April 7,

To all inn-"1022a it may COT/CF17? it known that Bimini: a citizen ofthe United States ant a resident t Chicago, in the county of Cool; andof Illinois, have invented certain new ant useful Improvements inStoker's of which the following is a description reieren e being' had tothe acc ompanying; drawing, which forms a part of my specification.

My invention relates to stoke s for sta tionary boilers or for marineboilers which are usually arranged side by side; the vention relatingmore especially to an'overteed Stoker whereby a battery of boilers maybe simultaneously supplied with fuel oeliverejd into the firebox at apoint above the Cirates of the boilers. v

One object of my invention is to provide 'stoker me-"hanismwhereby thefuel will be automatically delivered in a-substantially even or uniformmanner throughout the nre box ofthe boilers, nameli' throughout the ientire grate bar area of the firebox from front torear of the vfireboxand uniform combustion maintained.

The objects and advantages of niy'invenmore fully com ehended til thefollow' lg detailed desc lotion of the accompanying drawing;-wherein: p

l igure l a sectional elevation of a portion of the firebox of aboilerprovided with m. improved stoke-r mechc nisn which is shown in elevationFigure 2 detail se-tional. vieuu in per spec-tire of the fuel carryingand feeding portion of the Stoker. j

Figure 3 is a detail sectional View taken substantially on the line 3-3of Figure 1 looking in the direction of the arrows.

Figure -l is a detailview in side elevation of the fuel arrying and feedniechanisn i shown in Figure. 2, showing the opposit side thereof. i i

In the particular oxenu ilification of tle invention; a portion or thelireh 2; end a boileris illustrated at 10, with portion .o" the innerwall shown at 11 and the cute wall shown at '12; the firebox beingprovided with suitableg'rate construction as illustrated at 13. Theouterwall 12 is provided with the usual firedoor at 14.- at a pointslightly above the planeot the grate-bars and this wall at. apolnt abovethe l1sual fire-- door-Ll is provided with-a doorlfi extending Banrnrn,

1824. Serial No, 7044 5389.

substantially throughout thewidth ofthe firebox. The door 15 is mountedto-slide x'eidically into and out 01": closed position and is showncontrolled by means of a suitable cable or chain 16 disposed about-apulley ii? securedto the wall of the firebox; the cable or chainextending to a suitable point wl mechanism common to all doors 15 ofeach boiler of the battery inorder that these doors may besimultaneously, controlled.

At a point removed fromthe outer wall o the firebox I provide a-suitablesupportif frame, composed of standardsas at 18, which may be providedwith an electric motor as at l9 l -with the V armature-shaft thereofprovided with a belt or chain 20. This belt 20 extends about a pulley21secured to the end oft-a soat't 22 which has proper bearing in theupper part of the standa ds of the supporting frame 18 and whichshattextends transversely of theentire battery o" boilers; a method ofsupportinn; the shaft being more clearly shown in Figure i, j r V i Theshaft 22 at points substantially in ment with the center of each, dooropeni- 2' l is provided a cogz wheol 23 arranged inmesh wit is 0? lengthsuificient to extend practically to the inner wall T? i olf the fireboxand still remain in mesh with the co wheel.

nape construction shown in F gure 3, for major portion of its length; ithe upstanding portion being; provided rthe teeth with which thecog-wheel-is l in mesh. The lower laterallydisposed po'r tions 01, therack-bar are arranged to-travel vbetween the lower roller 25 and theupper pair of rollers '26 disposed ea h side of the upstanding toothedportion of thebar;

or 24 may be ofthe inverted ,re it be controlled by any suitable to beof length substantially equal to the door opening 15 and thereforesubstantially equal to the width of the firebox; the container 28 beingpreferably provided with an arcuate bottom 29, shown riveted to the bar27 and also provided with end walls 30, 31 to provide a sector-shapedcontainer. The container is also provided with side walls 32 and 33pivotally secured to the end walls as at 34 and 35, respectively; thatis to say the side wall 32 is pivoted and. disposed within the end walls30 and 31, to permit the side wall 32 to swing within the container fromits normal position shown in full lines in Figure 2, to the dotted lineposition shown in said figure; while side wall 33 is arranged to lap orabut against the end walls and is therefore pivoted to the end wallexterior. The side wall 33 is intended to swing outwardly away from theside of the container when the latter is traveling through the fireboxopening 15.

The. pivotal points 34 and 35 are spaced apart to provide the container28' with an opening in the top through which the fuel is introduced bymeans of a suitable chute 36 leading from an overhead hopper asillustrated; a portion of the hopper being shown at 37 in Figure 1. Thechute 36, it will be understood, may be of width and length tocorrespond with the width and length of the opening in the top of eachcontainer, a separate chute 36 being provided for each container. Theside wall 33 is shown provided with an upstanding flange or portion 38which is adapted to engage the side of the chute 36, when the container28 is in position therebeneath, so as to hold the side wall .33 inclosed position while the container is being filled with fuel; and thisside wall 33 may also be provided with av depending extension as at 39adapted to abut against the fire-door 15 when the latter is in closedposition, thus ensuring the side wall being maintained in closedposition.

The chute 36 may be provided with any suitable closure at its bottom, asfor example a swinging door 40 suspended by links 41 arranged at eachend of the chute. One of the links 41 may be provided with a. suitablespring as at 42 whereby the swinging door 40 is returned to and held inclosed position; the door 40 at one side, being shown provided with anupstanding flange 43 on the side to which the door is swung when opened;said flange limiting movement of the swinging door toward the oppositeside of the chute through the act-ion of the spring. One or both of thelinks 41 may be provided with a suitable pull rod or cord as at 44, operable from a suitable common point to enable the operator tosimultaneously open all of the chutes so that all of the containers maybe filled with fuel. As soon as the pull Q 99 's i rel as d he swingiagdo rs 40 of the respective chutes will move to closed position andprevent further discharge of fuel.

The pivot or journal 34 of the swinging side 32, at one end of thecontainer, is provided with an arm 45 fixedly secured thereto and thisarm, together with swinging side 32 are held in normal and returned toclosed position by means of a suitable spring as at 46 which may also besecured in a suitable manner to one of the end walls of the container.Th free end of the arm 45 has a cable 47 secured thereto and this cableis passed about a pulley 43 secured on the end wall of the container ata point adjacent to the opposite or forward side wall as shown in Figure4; while the oppositeend of the cable 47 is secured to a suitable drum49 D'IOLlDtQd on the shaft- 22 on which cog-wheel 23 is secured.

The drum 49 is of smaller diameter and circumference than the diameterof cogwheel 23, with the result that the cable 47 will be unwound at aslower speed than the travel of the rack-bar 24 and the container 28. Asaresult of this construction and arrangement, the cable 47 (which at alltimes is maintained taut) will cause the side 32 to be slowly swungthrough the container 28 while the latter is traveling at a slightlygreater speed toward the inner wall of the firebox. This inward swingingmovement of th wall 32 will continuously and gradually force the fuelout through the freely pivoted side 33 while the container is travelinginto the firebox, and cause the fuel to be more or less evenly oruniformly distributed throughout theentire grate-bar of the firebox.

In operation, all of the containers 28 are initially positioned beneaththeir respective chutes 36 and the operator, by means of pull rods orcables 44, moves the swinging doors 4f) beneath the chutes into openposition thereby allowing the fuel topass through the open tops of thecontainers until the latter are filled, at which time the cables or pullrods 44 are released, which permits the slide doors 40, through theactions of the springs 42. to return to closed position and shut off thefurther discharge of fuel.

The slide doors 15 of the battery of fireboxes are then drawn upwardthrough the medium of pull cords 16. at which time the motor 19 is setin operation, causing shaft 22 (which extends throughout the length ofthe bat tery of fireboxes and which is provided with a cog-wheel and adrum for each container) to be revolved. This will cause the rack-barwith the container to be forced through door gpening 15 toward the innerwall of the fire-- ox. doors 15 of the firebox. as well as the movementof the containers '28 away from their respective chutes 36, releases theswinging side wall 33 and allows it-to swing into open The upwardmovement of the slide pesitiea through the ction or; the pressure rent .of the side wall 32 induced by the nnwiucw,

of the cable 47 at a slower speed than the speed of travel of therack-bar, i'QSlll-tlilg from the differences in diameter of the con;Wheel and the diameter of the drum. As a, result, the fuel graduallyforced eat of the containers by the sweeping action of the side wall 82.Reverse moi ment the motor will cause the rack-bars with the containersto be withdrawn from the firebo 9 and at the same time the respectivecao 47 will also be wound up on their respective drums 49, so that whenthe containers h ve returned to loading position beneath theirrespective chutes, the swinging have returned to closed position. Inorder that the swinging sides 32 cannot move outwardly, through thepressure of the fuel, the container is provided with a flange as at 50which will hold the side wall against outward movement.

I'have shown what I believe to be a simple embodiment of my invention,which has bee described in terms employed merely as terms.

of description and not as terms of limitation, as structuralmodifications are possible and may be made without, however, depart ingfrom the spirit of my invention.

What I claim is:

1. A stoker, comprising a horizontally traveling member, a fuelreceiving container secured to said member, the opposite sides of thecontainer being pivoted to swing, with one of said sides be ng adaptedto swing away from the container, while the other side is adapted toswing through the container, power imparting means whereby the travelingmember and the container are made to move through a firebox toward theinner wall thereof, and means controlled. by said power imparting means,whereby said second mentioned side of the container is moved toward theopposite side of the container.

2. A stoker, comprising a travelingmeniber adapted to move into thefirebox of a boiler, a fuel receiving container sr-icnrcx to said memberand provided with movable sides, the forward side being adapted to moveoutwardly into open position, while the opposite side is adapted to moveinto the container toward the first mentioned side, means whereby saidtraveling member and the container are moved into the firebox, and

. means, operable with said first means, wheresidesv w ll and having a,fuel-receiving opening; in its top, the opposite side wall of thecontainer being pivotally monntct, the one side wall being adapted toswing away from the tainer into open position, while the side wall isadapted to swing thin container to force the the! through mentionedsite, a driving shaft provided.- ..with a cog-wheel and a drum ofdifierc diameters, the conewheel'bemg arranged in by said second sidewall is forced into the container while the latter is traveling into thefirebox. V i

4:. A stolrer, comprising a fuel holding container provided with a fuelreceiving opening in the top, one side wall of the container beingarranged to move outwardly, while the oppositeside wall is arranged tomove toward said first side wall, means whereby said second mentionedwall is yield ingly held in closed position, a horizontally travelingarm to which the containeris scoured, power imparting means whereby saidarm with the container is caused to travel into and out of the fireboxof a boiler, and means controlled by said power imparting mean wherebysaid second mentioned side wall of the container is caused to movetoward the first mentioned side wall and the fuel thereby forced out ofthe container.

5. In a stoker of the character described,

a horizontally traveling rack-bar, a fuelholding container secured tothe forward 6. In a stolrer of the character described, I

the combination of anoverhead fuel supply chute, a container providedwit-h an opening in 1ts top adapted to be positioned beneath the chute,the forward side wall of the contamer being pivoted to swing outwardly,

while the opposite orrear side wall of the container is adapted to movethrough the container toward said forward side wall, a supporting frame,a rack-bar mounted on the frame to travel horizontally and to'carry saidcontainer, a power shaft mounted in said frame and provided with apinion meshing with the rack-bar and with a drum of smaller diameterthan the pinion, and a flexible connection between the drum and saidrear side wall, said connection being so arranged that a pull on therear side wall is exerted while the rack-bar and the container aretraveling into the firebox of a boiler.

7. A stoker of the character described, comprising a supporting frameprovided with a power-shaft and with rollers arranged in differenthorizontal planes, a bar arranged to travel horizontally between therollers in the different planes, a fuel holding member secured to theforward end of the rack-bar, the forward side wall of the member beingadapted to move outwardly while the rear side wall is adapted to moveforwardly through the member means whereby the side walls are yieldinglyheld in normal position, means intermediate of the power shaft and saidbar whereby the latter is caused to travel horizontally, and meansintermediate of the power shaft and said rear side wall of the memberwhereby said side wall is caused to move forwardly while the member istraveling forwardly into the the box of a boiler.

8. A Stoker of the character described, comprising an overhead chute,spring con trolled closure means for said chute, a fuel holdingcontainer adapted to travel horizontally toward the inner wall of afirebox, one wall of the container being adapted to move through thecontainer toward the opposite side to force the fuel from the container,power means whereby the container is made to travel through the firebox,and means intermediate of said power means and said movable wall of thecontainer whereby the latter is progressively moved toward the oppositeside of the container while the latter is being fed into the firebox.

ALLEN G. BARHITE.

lVitnesses Z G. HEIDMAN,

F. A. FLoRnLL.

